炉外处理技术的发展和优化

炉外处理技术是铁水预处理和钢水精炼技术的总称.几十年来铁水预处理和钢水精炼技术走过了研究开发、产业化和发展完善的道路,最终确立了自己在钢铁生产流程优化和产品结构优化中独特的、不可代替的地位和作用.我国炉外处理技术在90年代以来加快了发展步伐,并在技术上跟紧了世界发展的步伐,但还需要加快优化.今后10年中,炉外处理仍将朝着高效、优质、低耗、灵活和新型的方向发展.     

三钢炼铁生产技术进展

近几年来,三钢通过改善原燃料条件、优化炉料结构、实施技术改造、优化高炉操作、加强管理等措施,使炼铁生产取得了明显进步,技术经济指标明显改善.2003年,各高炉平均利用系数达到了3.968.     

电感耦合等离子体质谱法测定高纯镓中痕量元素

探讨了电感耦合等离子体质谱仪(ICP—MS)测定高纯镓中痕量元素的新技术，实验采用气固反应原理分离镓主体，富集杂质元素；采用10ng/ml Rh和Se为双内标补偿校正镓基体的抑制效应，采用碰撞室(CCT)技术消除多元素分子离子的干扰；使分离富集技术与ICP—MS技术联用，可满足99．9999％超高纯镓的分析要求。方法的检出限0．001～0．01μg／L，加标回收在90．6％～111．1％之间，RSD为0．27％～7．00％。     

在CSP线生产V微合金化钢的探讨

分析了V微合金化钢的强韧化机理及CSP生产线的工艺特点，探讨了V微合金化技术在CSP生产线应用的可行性和应注意的主要问题。V微合金化钢控轧控冷工艺技术特点是再结晶轧制与加速冷却相结合，而这一控制轧制特点正是CSP工艺的特征和优势。国外CSP线在投产之后已成功将V微合金化技术应用于该领域，并形成了不同系列。     

钢包包衬搅拌桥式台车的研制及应用

转炉炼钢——全连铸的生产节奏的加快，对钢水包的使用寿命和修砌质量提出了更高的要求。经过长期生产实践和摸索总结，马钢二钢厂采用了钢包包衬整体打结和二次剥拆技术，替代了传统的砖砌钢包的人工修砌工艺。详细介绍了马钢二钢厂40t纯氧顶吹转炉——全连铸钢包包衬整体打结设备技术的研制及应用效果。     

PKI技术在政府办公自动化系统信息安全中的应用

介绍了PKI(Public Key Infrastructure,公钥基础结构)的基本概念、基本组成。根据某办公自动化系统安全的实际需要,将PKI技术引入到办公自动化系统安全领域,提出了一种有效的基于PKI技术的信息安全解决方案模型。     

由Bluetooth实现的多媒体无线连接PC

Bluetooth技术能在短距离内用无线接口代替有线电缆连接。文中介绍了Bluetooth技术的基本特性，讨论了基于Bluetooth技术的多媒体无线连接PC(Multimedia Wireless Connection PC，MWCPC)的系统结构、通信协议软件栈，并对MWCPC的主／从单元连接建立和多MWCPC的从单元资源共享等问题进行了研究，实测效果良好。     

基于射频识别技术的装备维修器材管理信息系统设计

本文简要介绍了射频识别技术的基本原理，着重叙述了基于射频识别技术的便携式维修器材管理信息系统的组成、功能和特点。该系统运行可靠，操作方便，提高了装备维修器材保障的效率。     

Using regression splines to assess the impact of information technology investments on productivity in the health care industry

Abstract. This paper explores the impact of information technology (IT) investments on productivity using a new technique, multivariate adaptive regression splines (MARS). We believe that it provides additional insights on the nature of the impact of IT investments on productivity. The results from our study are compared with findings from a previous study that has also used the same data set. While the results of a previous study indicate that IT investments have a positive but uniform impact on productivity, our study suggests that the impact of IT on productivity is not uniform but is contingent on other complementary factors. Our findings describe that the complementary relationship exists between IT and non‐IT related investments. Thus, improved organizational productivity cannot be expected from investment in IT alone but only together with non‐IT investments. Our findings also point out that further investment may not necessarily bring on higher organizational productivity.     

Analysis, design, and development model: a case study of an internet-based system for insert and parameter selection

Abstract. The analysis, design, and development model (ADDM) is based on the systems lifecycle process (SLCP) in which analysts begin to understand external client requirements and internal client specifications as they are designing and developing a complex system. In the ADDM, clients and system analysts (SA) continuously interact as the system is being designed, developed, tested and maintained. In the design phase, system development can be altered when it is most cost‐effective. Depending on the type of environment and SA preference and expertise, various interfaces and software and hardware configurations are created during the SLCP. The SLCP ensures effective standardization and continuous quality improvements throughout development. The model follows modern information technology principles to integrate and monitor SLCP phases. A case is presented that describes an application of the ADDM. This case outlines the architecture of an e‐commerce production system (ECPS). The system has a three‐tier structure consisting of the client interface, Java server page (JSP) and database module. The model assists in designing economic production operations in an industrial setting by allowing a client to retrieve current production data needed for operations through the internet.